Carl Zeiss India [Bangalore] Ltd. Offers Light Weight Speed Lenses for Positive Lock Mount. Carl Zeiss India [Bangalore] Ltd. Supplies largest MMZ G coordinate measuring machine. Light Weight Speed Lenses for Positive Lock Mount are a perfect optical match to the high speed master prime lenses. Light Weight Speed Lenses for Positive Lock Mount offer the widest set available from the Ultra Prime 8R extreme wide angle lens to the best telephoto lens designed specifically for motion pictures, the Ultra Prime 180 mm, giving the flexibility to get the coverage the customer wants.